Multiple Choice
During which stage of the cell cycle do chromosomes replicate to form identical copies of themselves?
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11. Cell Division
Introduction to the Cell Cycle
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During which phase of the cell cycle are the chromosomes replicated?
A
M phase
B
G1 phase
C
G2 phase
D
S phase
Verified step by step guidance1
Understand the cell cycle: The cell cycle consists of several phases, including G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions in the life of a cell.
Focus on chromosome replication: Chromosome replication occurs during the S phase of the cell cycle. This is when the DNA is duplicated to ensure that each daughter cell receives a complete set of chromosomes after cell division.
Eliminate incorrect options: M phase is the stage of mitosis and cytokinesis, where the cell divides. G1 phase is a period of cell growth and preparation for DNA replication, but no replication occurs here. G2 phase is a period of preparation for mitosis, but DNA replication has already been completed.
Identify the correct phase: The S phase is specifically dedicated to DNA synthesis and chromosome replication. During this phase, the cell duplicates its genetic material.
Conclude: Chromosome replication occurs during the S phase of the cell cycle, ensuring that the genetic material is accurately copied for cell division.
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